The Bank of England has announced that Alan Turing, a computer pioneer and codebreaker, will feature on the new £50 note. Turing's work was crucial to the Allies in World War II, and he is also considered a father of computer science and artificial intelligence. The new note will be made of polymer and will enter circulation by the end of 2021. The decision to feature Turing on the note is seen as a tribute to his contributions to science and society.